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- Min Chen, Changyoon Oh, Aylin Yener
- VTC Fall
- 2006

We consider efficient scheduling for a delay constrained CDMA Wireless Sensor Network (WSN). Given a twotiered WSN model, we first find the optimum schedule for the intra-cluster communications, that minimizes the total transmit power of the sensor nodes, while maintaining the short term average throughput at each sensor. We show that the specifics of the… (More)

- Changyoon Oh, Aylin Yener
- IEEE Trans. Wireless Communications
- 2007

We consider the downlink throughput maximization problem for interference limited multiuser systems. Our goal is to characterize the optimum base station transmission strategy, i.e., whether the base station transmits to one-user (TDMA) or multiple users (CDMA). Specifically, we aim at determining the optimum number of users to be scheduled and finding the… (More)

- Changyoon Oh, Aylin Yener
- 2001

We consider the problem of adaptive cell sectorization in a CDMA system when the receiver employs a linear multiuser detector. Specifically, given the number of sectors and terminal locations, we investigate how to appropriately sectorize the cell, such that the total transmit power is minimized, while each user has acceptable quality of service, under the… (More)

- Changyoon Oh, Aylin Yener
- 2005

We consider the downlink throughput maximization problem for interference limited multiuser systems. Our goal is to characterize the optimum base station transmission policy (TDMA or CDMA), and find the corresponding power allocation. We model the interference by the aid of the orthogonality factor and determine the transmission strategy for a range of the… (More)

- Changyoon Oh
- 2001

Lan and Tewfik [3] have said that mobile communications and computation platforms must rely on batteries for their operation. Unlike other enabling technologies for mobile information systems, the specific energy of commercially available rechargeable batteries has improved at only about 2 percent per year over the past half century. Since frequent… (More)

- Changyoon Oh, Aylin Yener
- EURASIP J. Wireless Comm. and Networking
- 2007

We consider the joint optimization problem of cell sectorization, transmit power control and multiuser detection for a CDMA cell. Given the number of sectors and user locations, the cell is appropriately sectorized such that the total transmit power, as well as the receiver filters, is optimized. We formulate the corresponding joint optimization problems… (More)

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